Ios uiscrollview

Since the introduction of Auto Layout to iOS, there is a new way you can configure your scrolling content. With Auto Layout, the amount of ios uiscrollview you have to write is greatly reduced.

UIScrollView has gone through some major improvements. Starting with iOS 11, Apple introduced content and frame layout guides to make it a little less confusing to configure the content inside of your scroll view. Xcode 11 also added these layout guides to interface builder. I will also show you how the scroll view can move your content out of the way of the pop-up keyboard. Are you working on a project that cannot target iOS 11 yet? No worries.

Ios uiscrollview

Scroll views have two main purposes:. Scroll views are created as any other view is, either programmatically or in Interface Builder. After that, only a small amount of additional configuration is required to achieve basic scrolling capabilities. A scroll view is created and inserted into a controller or view hierarchy like any other view. There are only two additional steps required to complete the scroll view configuration:. You can optionally configure any visual cues your application requires like vertical and horizontal scroll indicators, drag bouncing, zoom bouncing, and directional constraint of scrolling. Open the ScrollViewDemo project from the project files you downloaded. It contains a simple project with a single view controller in the storyboard that has been linked to the ScrollViewController class created in the project. I have also included an image named image. The above creates a scroll view and an image view. The image view is set as a subview of the scroll view. We set it equal to the size of the image view x FlexibleWidth and. FlexibleHeight so that it readjusts its size when the device is rotated.

This is where ios uiscrollview horizontal scroll view will go. Content Layout Guide Constraints Attach four constraints top, bottom, ios uiscrollview, left, right from our single content view to the content layout guide. Do this by pressing and holding the Ctrl key and dragging from your single content view to the content layout guide.

This tutorial assumes you understand how to use Interface Builder to add objects and connect outlets between your code and storyboard scenes. Use the Download Materials button at the top or bottom of this tutorial to download the starter project, then open it in Xcode. Continue using the iPhone 8 simulator for the rest of the tutorial. Open Main. Then, move Image View inside your newly-added Scroll View.

This tutorial assumes you understand how to use Interface Builder to add objects and connect outlets between your code and storyboard scenes. Use the Download Materials button at the top or bottom of this tutorial to download the starter project, then open it in Xcode. Continue using the iPhone 8 simulator for the rest of the tutorial. Open Main. Then, move Image View inside your newly-added Scroll View. Your document outline should now look like this:. To fix them, select Scroll View and click the Pin button at the bottom of the storyboard window. Add four new constraints: top, bottom, leading and trailing. The result should look like this:.

Ios uiscrollview

Since the introduction of Auto Layout to iOS, there is a new way you can configure your scrolling content. With Auto Layout, the amount of code you have to write is greatly reduced. One of the big pain points with the old way of setting up a UIScrollView was communicating the content size to the scroll view. It was fairly straightforward to calculate your content size if the content in the UIScrollView was an image. But it was not as easy if your scroll view included a mixed bag of buttons, labels, custom views, and text fields. Lengthy code adjustments were needed to reflect constant changes in device rotations and phone size differences. I will also show you how the scroll view can move your content out of the way of the pop-up keyboard. I want to give you a sense of what we are building so you can follow along and see how the view is constructed. I created a view with some labels, text fields, and an image.

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Jay says:. Is your content view the correct size at runtime? August 18, Using a single child view will simplify the constraints we have to add later. January 23, Erik says:. James Scott says:. Mark Reid says:. Amalan says:. May 28, Mike Woelmer says:. Therefore you need to set an explicit height or make their height relative to other controls. When you set the image of the image view, its size will be used as the content size of the scroll view. Great work! I spent 15min in android and windows phone to integrate the component.

In order to make the UIScrollView scroll, you have to manually tell it how tall and wide the content is.

Once you start editing a text field, the keyboard animates into view, and your scroll view animates the active text field to be above the keyboard. March 12, Therefore, I need to set the width of my single content view to be the width of the scroll view. Jack, you are wrong. You can, for instance, set its minimum and maximum zoom scale. I found this really helpful. In fact you should be able to use a stack view as your container view. I just built a form with 8 text fields that layout vertically in iPhone portrait or landscape w:compact h:any in adaptive layout speak and in two columns for ipad portrait or landscape w:regular h:any in adaptive layout speak. Juan says:. Jean-Michel Decombe says:. You can pull my sample code from github to see how I have done my constraints. The view controller will look as shown.